update: database records for all resources.

pkg/util/pagination/pagination.go

@@ -0,0 +1,46 @@
+package pagination
+
+import (
+	"github.com/Masterminds/squirrel"
+	"math"
+)
+
+type PaginationRequest struct {
+	Page     uint64
+	PageSize uint64
+}
+
+func NewRequest(page, pageSize int32) PaginationRequest {
+	if page == 0 {
+		page = 1
+	}
+
+	if pageSize == 0 {
+		pageSize = 15
+	}
+
+	return PaginationRequest{
+		Page:     uint64(page),
+		PageSize: uint64(pageSize),
+	}
+}
+
+func (pr *PaginationRequest) Offset() uint64 {
+	// start at page 1.
+	return (pr.Page - 1) * pr.PageSize
+}
+
+func (pr *PaginationRequest) CalculatePages(count int) int32 {
+	return int32(math.Ceil(float64(count) / float64(pr.PageSize)))
+}
+
+func (pr *PaginationRequest) ApplyToSelect(sb *squirrel.SelectBuilder) *squirrel.SelectBuilder {
+	if pr == nil {
+		return sb
+	}
+
+	result := sb.Limit(pr.PageSize).
+		Offset(pr.Offset())
+
+	return &result
+}